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lMAWHI'PHW y Hub.

No.V 19,82@ Patented Mar. 30, 1858.

3 Sheets- Sheen J. M. WRITING.

Patented Mar. 30, H568.

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No. 19,820.vv V' 'l Patented Mar. s0,-.185s.

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UNITED STATES JAMES M. WHITING, OF NEX/V BEDFORD, MASSACHUSETTS,ASSIGNOR TO GEO. F. WILSON', ALFRED ANTHONY, AND JAS. M. WHITING.

HUB 0F CARRIAGE-WHEELS.-

Speccaton of Letters Patent 'No. 19,820, dated March 30, 18158.

To all whom it may concern:

Be it known that I, JAMES MONROE IHIT- iNG, now cf the city of NewBedford, in the county of Bristol, in the State of Massachusetts, haveinvented a new and useful Improvement in Carriage Hubs; and I do herebydeclare that the following is a full, clear, and exact description ofthe construction and operation of the same, reference being had to theannexed drawings, making a part of this specification, in which- Figurel is a plan of the hub. Fig. 2 is a longitudinal (cross) section of thesame, showing the axletree inserted. Fig. 3 is a plan of the end of thehub, and Fig. 4 is a transverse (cross) section of the hub through themortises.

In Fig. l, a, e, e aremortises for the spokes.

In Fig. 2, a a a a represents the body of the hub, b, b, Z),india-rubber, c, c, box, receiving the axletree, e, c, compressing nutf, f,.nut fastening the hub to the axletree, g, the axletree.

In Fig. 3, z', c', z', z', are grooves in the body of the hub.

In Fig. 4, h, 7L, h, 7L, are projections on the outer side of the box.

To enable others skilled in the art to make and use my invention I willproceed to describe its construction and operation.

I construct the body of the hub a (L a a of any suitable material, butprefer wood. I make the hole, passing through the hub, Fig. 2, at rightangles to the spokes, for the purpose of receiving the box c, c, ofconsiderably greater diameter than the box itself. This hole at each endof the hub, is enlarged for a suitable depth, to a still greaterdiameter. Into this larger hole, at each end of the hub, I insert acylinder of vulcanized india-rubber or gutta-percha, o, I), b, o, havinglongitudinal holes through them of the proper diameter for the receptionof the box. Through these holes I insert the box c, o, upon the smallerend of which is previously cut the screw-thread for the reception of thecompression nut e, e. This nut,

when screwed firmly into its place, serves the double purposeof holdingthe box securely in position, and of compressing and packing thevulcanized elastic india rubber or gutta purcha o Z) o Z9 into its seator position in the hub. The hub, thus fitted, is put on the axletree g,and secured from v loose in the hub.

coming off by the nut f, f,which is screwed on tothe end of theaxletree.

Similar letters of reference indicate corresponding parts in each of theseveral figures.

In Fig. 3, c', z', z', z', are grooves in the hub intoy whichthe elasticsubstance may be tted or compressed to prevent it from turning in thebody of the hub. s

In Fig. 4, 7L, 7L, 7L, 7L, are grooves in the inside of the box whichserve to aid in the lubrication of the axletree by oil. c, c, 7c, 7;,are projections on the outer side of the box, which being litted orforced intovthe elastic substance serve to prevent the box from turningtherein.

The space m m Fig. 2 between the box and the body of the hub maybelilled with the like of the elastic substance o o Z9, but I prefer, forobvious reasons, to have it thus unoccupied. In the first place it ischeaper to construct the several parts as shown. In the next place, ifthis space was so filled, the benefits to be gained by the greaterthickness of the elastic substance b Z2 b b, as shown, would be reducedto a minimum which could be obtained by a piece no thicker than would berequired to lill the said space. Again, if the spokes should come incontact with the elastic substance, they would on account of its veryelasticity, be more likely to work There is another and importantreason, why I prefer to have this so vacant, and ust suliicient tosecure all the elasticity in the substance o, o, Z2, o. I am enabled tohave the material of the body of the hub so as to secure the projectionsw, w, fw, w, which serve the triple purpose of preventing the hub fromcoming off, and of affording sutlicient depth for the mortises e a e e,for the tenons of the spokes, without increasing the diameter of thehub, in an inconvenient and unsightly manner, and of a shoulder, againstwhich the compression nut E, E, may act in forcing the said elasticsubstance firmly into its seat. This elastic material, b, b, o, l), maybe continued through the hub without diminution of its thickness and inone piece, and may be allowed to project slightly beyond the body of thehub at each end; compression may then be had, by means of the screw andnut and the hub may be prevented from coming oft', by extending theshoulder of the box at one end, and the compressing nut at the otherend, beyond the rubber, or other elastic material, so as to take hold ofthe body of the hub; but I prefer,'for the reasons eX- pressed above, aswell as others, the plan of construction delineated in the drawings.Another and very important reason still, is, that by this method ofconstruction, I am enabled the better to secure the natural elasticityin the material and leverage of the hub, between the fulcrums, or pointsof support, Z), b, b, b, at each end. It is obvious,.

The effect and operation of this method of constructing hubs, is, toprevent, in a great degree, the injury to .wheels and carriages causedby the striking of the wheels, when in use against solid bodies.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The making of the hub an elastic compound cylindrico-lever, each endof which .rests for a fulcrum on vulcanized india rubber, or guttapercha, or other elastic substance, in combination with the compressingnut, by which the pressure thereon may be regulated.

2. I also claim the grooves in the body of the hub, or their equivalent,and the projections on the outside oit' the box, or their equivalent, incombination with the said elastic substance.

JAMES M. WHITING. [n s] v Witnesses:

JAMES TUCKER, Jr.,

OLIVER DAvIs.

